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Pramuko Ilmu Purboputro
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Department of Mechanical Engineering Faculty of Engineering Universitas Muhammadiyah Surakarta
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Majalah Teknik Mesin
Published by Universitas Muhammadiyah Surakarta
ISSN : 14114348     EISSN : 25414577     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Media Mesin: Majalah Teknik Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Universitas Muhammadiyah Surakarta, Indonesia. Media Mesin: Majalah Teknik Mesin is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Media Mesin: Majalah Teknik Mesin accepts submissions from all over the world, especially from Indonesia. Media Mesin: Majalah Teknik Mesin aims to provide a forum for national and international academicians, researchers, and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Media Mesin: Majalah Teknik Mesin is specific topics issues in mechanical engineering such as: Energy Conversion and Management Thermofluids Material and Manufacturing, and Design and Structure All articles submitted to this journal can be written in Bahasa Indonesia and English. The journals will be published two times a year namely in January and July.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 2 Documents
 1 
Search results for , issue "Vol. 27 No. 1 (2026)" : 2 Documents clear
STUDY ON THE INFLUENCE OF THE ANGULAR DIRECTION OF ALUMINUM COOLING FINS ON THE WORKING TEMPERATURE OF SOLAR PANELS Binyamin, Binyamin; Riswan, Muhammad; Nugroho, Andi; Julianto, Eko
Media Mesin: Majalah Teknik Mesin Vol. 27 No. 1 (2026)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

The utilization of solar energy through solar panels as a source of electrical energy for households and street lighting is increasing rapidly. However, solar panels face problems related to working temperature. When the absorption of solar radiation is too high, it results in a decrease in efficiency. High temperatures cause solar panels to produce lower energy than in cold conditions. Therefore, the purpose of this study was to explore the effect of aluminum cooling fins on solar panels, with variations of fin inclination angles of 30° and 45°, and compared with panels without a cooling system to reduce the working temperature of solar panels by using cooling fins and air blowing media. The results showed that at an angle of 30°, the panel temperature was 43.60°C at the 13th iteration, with a temperature drop of about 3.13%. At an angle of 45°, the temperature obtained was 41.80°C with a temperature drop of about 6.68%. Meanwhile, the uncooled condition reached a maximum temperature of 44.40°C. No cooling causes the panel temperature to be higher, and the 45° angle provides a better cooling effect than the 30° angle, although the difference is not very significant when compared to the uncooled condition.
THE EFFECT OF USING DUST AS A BENTONITE SUBSTITUTION ON THE CHARACTERISTICS OF RECYCLED GREENSAND MOLDS Hariningsih, Hariningsih; Rizka, Tasha
Media Mesin: Majalah Teknik Mesin Vol. 27 No. 1 (2026)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

The metal casting industry faces global challenges in managing greensand dust waste containing silica and clay from bentonite and silica sand, which has the potential to cause environmental and health impacts. Therefore, this study analyzes the effect of greensand dust utilization on the characteristics of greensand molds made from return sand. Additionally, this study aimed to ascertain the ideal percentage of dust required to attain the maximum green compression strength (GCS) value. This study examined dust usage variations of 0%, 15%, 30%, and 45% relative to the weight of bentonite. When calculated based on the weight of sand, these proportions translate to 0%, 0.09%, 0.18%, and 0.27%. The sand underwent several tests, including assessments for compactibility, moisture, permeability, grain fineness number (GFN), green compression strength (GCS), dry compression strength (DCS), wet tensile strength (WTS), active clay, volatile combustible material (VCM), and loss on ignition (LOI). The application of dust from greensand molds in the metal casting sector suggests that this dust can effectively replace bentonite. The ideal formulation for the molding sand includes 100% return sand, 0.42% bentonite, 0.18% dust, and 2.9% water. Specifically, the most efficient binder combination consists of 70% bentonite and 30% dust. This particular mixture achieves the highest GCS of 13.4 N/cm². A greater GCS value signifies that the molding sand possesses an improved ability to withstand the pressure from the molten metal during the pouring process.

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